Window-operating mechanism.



H. L. EIOHHORN. WINDOW OPERATING MECHANISM.

APPLICATION FILED OUT. 26, 1912.

Patented Aug. 12, 1913.

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HARRY L. EICI-II-IORN, OF CHICAGO, ILLINOIS.

WINDOW-OPEBATIN G MECHANISM.

Specification of Letters Patent.

Patented Aug. 12,1913.

Application filed flctooer 26, 1912. Serial No. 727,841.

To all whom it may concern:

Be it known that I, HARRY L. EioHHoRN, a citizen of the United States,residing at Chicago, in the county of Cook and State of Illinois, haveinvented a certain new and useful Improvement in Window-OperatingMechanisms, of which the following is a full, clear, concise, and exactdescription, reference being bad to the accompanying drawings, forming apart of this application.

My invention relates to devices for operating pivoted closures foropenings in walls or roofs, and is particularly applicable to theopening and closing of windows, shutters or ventilators made with steelframes and pivoted in steel mullions. Where a number of such windows areto be opened or closed simultaneously, it has heretofore been customaryto use operators consisting of rocking shafts supported on brackets nearthe windows and connected to the windows by links or gears. With such aconstruction, the links, brackets and shafts usually project in anunsightly fashion. Moreover, the lost motion between the variouselements of such a window-operating system makes the mechanism apt tocause a noisy rattling. Also, it is often difiicult to close the windowstightly, as the lost motion in many joints intervenes between eachwindow and the point at which the manually actuated part of theoperating mechanism is fastened.

The object of my invention is to produce a window-operating mechanismhaving its parts so arranged that they will not project in unsightlyfashion from the walls, but will be partly hidden from view; one thatwill lock each window securely in any position right at the window; thatwill be simply and cheaply built; and one that may easily be installedwithout changes in the framing of the building. I accomplish theseobjects by the construction shown in the accompanying drawings, in whichFigure 1 is a partial elevation of one form of my operating mechanism asapplied to a steel sash window. Fig. 2 is a vertical section through thesame along the line 22. Fig. 3 is an enlarged vertical section throughthe guide member fastened to the window. Fig. 1- is an enlarged sectionalong the line 47-4.

in the drawings, A is a window-frame having a transverse mullion Badjacent to the central cross-bar C of a swinging window D. Mounted uponthe mullion B are trunnions E pivoted by hollow bearings F to brackets Gupon the cross-bar C of the window. Fastened to this cross-bar G is aguide H having a rectangular opening through which a flat bar I isadapted to be slid in a direction parallel to the cross-bar C. Thisguide H preferably has rollers K to reduce the friction of the bar Iwhen the latter is slid through the guide. L is a similar guide fastenedto the mullion B and similarly fitted with rollers M engaging the samebar I.

N is a flexible member such as a wire rope or chain, attached at itsends to opposite ends of the bar I and preferably passing through thehollow bearings F.

When the bar I is in the position shown in Fig. 1, the portion betweenthe two guides H and L is preferably untwisted, while the portion of thebar extending beyond the guide H has a twist slightly greater than theangle through which the window is to be moved when opening the same. Thebar 1 is preferably made of wrought iron and suiiiciently heavy toresist any torsional strain which might be caused by wind pres suretending to open the window. If the flexible member N is drawn in thedirection of the arrow 0, the bar will engage the guide H along itstwisted portion, and as the guide L will prevent the bar itself fromturning, the latter will rotate the guide H to an amount correspondingto the twist between the engaged portion of the bar and that engaged bythe fixed guide L. Consequently, the window-moving guide H will swingthe window D, to which it is fastened, through a corresponding angle.Likewise, if the flexible member N is drawn back in the oppositedirection, the twist in the bar I will cause the window-operating guideH to return the window to its closed position.

It will be obvious that by varying the twist of the bar I, thewindow-operating member H may be caused to move the window through anydesired angle. Also, that by spacing the rollers K and M to leave ustroom enough between them for the bar I, the latter will lock the guidesH and L against relative rotation at any position in which the bar maybe stopped. Consequently, the window to which the window-moving member His fastened will be locked in position regardless of any lost motionbetween the mechanism as pictured and the point at which the operatorimparts motion to the flexible member N. By placing the guide members Hand L within the angle of the cross-bar C of the window, they will bepractically concealed from the view of any one standing at some distancebelow the window. Likewise, the flexible member N may be run close tothe steel framework or walls of the building, so that the wholemechanism may be much less conspicuous than has been possible with thedevices heretofore used. Moreover, the reciprocable bar I may beactuated by any one of many means of reciprocating the chain or flexiblemember N, the only requirement being that motion shall be imparted tothe bar I in the direction of its length, and that the bar shall have atwisted portion adjacent to one pair of the guide rollers when the baris at one extreme of its reciprocation.

WVhile I have shown the bar I as of a wide rectangular section, I do notWish to be limited to this particular form of angular section. Neitherdo I wish to be limited to other details pictured and described, sinceit will be obvious that numerous modifications could be made withoutdeparting from the spirit of my invention. For example, the drawingsshow the axes of the rollers upon the guides H as substantially inalinement with the axes of the rollers of the guides L when the windowis in its closed position, these roller guides being thrown out ofalinement when the window is opened. However, the action would be thesame regardless of the initial alinement of the parts when the window isclosed, since a twist in the bar would always serve to move the axes ofthe rollers into or out of alinement with each other when the bar isslid through the guides.

What I claim as new and desire to cover by Letters Patent is:

1. A window operating mechanism, including a longitudinally reciprocableangular bar twisted for a portion of its length; a guide mounted uponthe window frame; and a window-moving member mounted upon the window;the guide and windowmoving member each having a plurality of rollersaliording sliding engagement with the angular bar, whereby the twist inthe bar will cause the bar to rotate the window moving member withrespect to the guide when the bar is moved longitudinally.

2. An operating mechanism for a. window having pivoted bearings,including in substantial alinement with the said bearings awindow-moving member mounted upon the window; a guide-member upon theframework of the window; and a reciprocable member having slidingengagement with the said'windowdnoving and guide-members; thereciprocable member having a twisted portion adjacent to one, and anuntwisted port-ion adjacent to the other, of the members with which ithas sliding engage ment.

3. An operating mechanism for a window having pivoted bearings,including in substantial alinement with the said bearings awindow-moving member mounted upon the window; a guide-member upon theframe work of the window; and a reciprocable bar having slidingengagement with the said *indow-moving and guide-members; thereciprocable bar having a twisted portion adjacent to its engagementwith one of the said members when the bar is at one extreme of itsreciprocation.

d. A window operating mechanism including a guide upon the window frame;a window-moving member; a longitudinally reciprocable flat bar insubstantial aline ment with the said guide and window-moving members;the guide and window-moving member each having a pair of parallelrollers affording sliding engagement with the flat bar, the bar beingtwisted adjacent to its engagement with one of the said two pairs ofrollers when the bar is at one ex treme of its reciprocation.

5. A window operating mechanism, including a pair of guide rollersmounted upon the window frame; another pair of guide rollers mountedupon a window-moving member; and a -longitudinally reciprocable bartwisted for a portion of its length and adapted to slide between the twopairs of rollers.

6. An operating mechanism for a window ivoted upon hollow bearings,including in substantial alinement with the said bearings a flexiblemember passing through one of the bearings; guides mounted respectivelyupon the window and its frame; and a twisted bar engaging the guides andadapted to be moved longitudinally by the flexible member.

HARRY L. EIGHI-IORN.

Witnesses ALBERT SCHEIBLE, ARTHUR WVnsLEY.

copiestof this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, 13. 0.

